Gauge



umm. 192s. 1,555,905

H. E. KEMPTON `:umana Filed July 27, 1923 rammed Jan. 1o, 192s.

UNITED STATES HERBERT E. KEMPTON, OF` FOND DU LAC,

MENTS, TO THE IIEALD MACHINE COM CORPORATION OF MASSACHUSETTS.

WISCONSIN, ASSIGNOR, BY MESNE ASSIGN- A PAN'Y, OF WORCESTER,MASSACHUSETTS, A

GAUGE.

Application led July 27, 19'23. Serial N0. 654,057.

The invention relates to improvements in gauges for use in metalremoving operation, and has particular reference to a gauge memberadapted to be used in an internal grinding machine of the characterdisclosed in a.

copending application, Serial No. 620,604 led February 23, 1923 byPrentice Conradson, Herbert E. Kempton and Keith F. Gallimore.

In grinding machines of the above character, a reciprocating grindingelement passes back and forth through the bore of a revolving workblank, and a gauge member comprising a set of coarse feed gauge pointsand a set of tine feed gauge points automatically and periodicallyattempts to enter the bore of the work blank after each withdrawal ofthe grinding wheel. Mhen the grinding operation has proceeded to apredetermined point,the coarse feed gauge points enter the bore,whereupon means is'actuated for reducing the rate of cross feed. U onthe completion of the grinding operatlon, the line feed points enter thework, whereby the cross feed is discontinued and the grinding wheel ispermanently withdrawn.

The primary object of the invention is to provide a gauge member ofimprovedconstruction and form, and improved means for mounting orsupporting said member.

A further object is to provide a sturdy l gauge member which can beeasily and quickly assembled and disassembled, and which is extremelyaccurate and eilicient in operation.

Further objects and advantages will become apparent as the descriptionproceeds.

Referring to the drawings, Fig. 1 is a diagrammatic view showing a gaugemember embodying the features of my invention in operative relation to awork blank .being ground.

Fig. 2 is a sectional view of separate roughing and nishing gaugesmounted in position on a gauge rod.

Fig. 3 is an end view of the gauge member shown in Fig. 2.v

Fig. 4: is a sectional View of a modied form of 4gauge member showingthe rough- 5@ ing gauge formed integral with the gauge screw.

Fig. 5 is an end view shown in Fig. 4.

Fig. 6 is a sectional view of another modiof the gauge member flcationshowing the roughing and finishing gauges combined in one piece andmounted on the auge rod.

Fig. gis an end View of the shown in Fig. 6.

While the invention is susceptible, of various modifications andalternative constructions, I have illustrated in the drawings and willherein describe in detail the preferred embodiment, but it should beunderstood that I do not thereby intend to limit theinvention to suchconstruction, but aim in the subjoined claims to cover all legitimatemodiiications and alternative constructions falling within the scope ofthe invention.

In the drawings, l0 represents a work blank having an internal bore 11which is being ground by a reciprocable grinding element 12, and 13indicates a gauge member mounted on a gauge rod 14 for reciprocablemovement toward and from the work blank 10. Any suitable means may beemployed for reciprocating the gauge rod 14 in syngauge member chronismwith the grinding element 12 to bring the gauge member 13 repeatedlyagainst the work blank 10 in an attempt to enter the bore 11 asthegrinding element is Withdrawn. I have herein shown the gauge rod 14formed with an arm 15 carrying a roller 16 at its forward end. The gaugemember 13 is resiliently forced toward the work blank 10 by coil spring1'? surrounding the arm 15 and abutting at one end against a ixed stop18 and at the other end against a stop 19 rigidly secured to the arm 15,and is periodically moved out of engagement with the Work blank 10 by arevolving cam 20 adaptedto engage the roller 16. The cam may be actuatedin synchronism with the reciprocation of the grinding element by anysuitable means (not shown).

The gauge member 13 comprises a roughing gauge 21 having coarse feedgauge points 22, and a iinishing gauge 23 having fine feed gauge points24., the roughing gauge 21 being the smaller in size so as to Erst enterthe bore llof the work being ground. Preferably each gauge is made intheforni of a flat plate or disk with the gauge points at its peripheryand with a central bore 25.

have shown each gauge disk provided with four gauge points equallyplaced around the periphery, but any other suitable number of pointsspaced inany other desirthe depressions 26 may be formed with con- 1cave, convex or straight inner edges, as is illustrated respectivelyin'Figures 3, 5 and 7 at 27.

The gauges 21 and 23 are rigidly secured to the end of the gauge rod 14by means of a gauge screw 28 upon which they are mounted and which isthreaded into a bore 29 in the end of the rod. Fig. 2 shows separatelyconstructed v gauges 21 and 23 mounted side by side on the screw 28whereon they are retained by a plug 30, the roughing gauge 2l beingpositioned at the outer end. In the present instance the plug 30comprises an annular radial iange 30a fitting against the outer face ofthe gauge 21, and a hollow cylindrical sleeve 30b tting snugly into theenlarged forward end of a bore 28a extending through the screw 28. Thebore 28a constitutes part of a coolant passage extending through the rod14 and the plug 30.

l The two gauges are so positioned that the gauge'points on one registerwith the depressions 26 on the other, whereby the points 22 and 24 arealternately arranged about the periphery of the gauge member.

. In Fig. 4 the roughing gauge 21 is c0m' bined with the gauge screw 28,and a separate finishing gauge 23 is removably mounted on the screw 28and is held between the gauge 21 and the gauge rod 14. Fig. 6 shows theroughing and finishing gauges combined in one piece in which the coarsefeed points and the ne feed points are separated by. grooves 31 in theperiphery. In the combined form the points 22 and 24 are not alternated,but are formed in alinement.

In the grinding operation, the grinding element 12 reciprocates throughthe bore 11, and the gauge rod 14 under the force of the spring 17,periodically moves the gauge member 13 against the work 10. When thebore 11 has been ground to a predetermined diameter, 'the roughing gauge21 enters the bore and in so doing actuates means (not shown) forreducing the relative cross feed between the work 1 and the grindingelement 12. When the bore 11 has been ground V be easil e5 to thedesired size, the finishing gauge 23 finally enters the bore and therebyeifects a discontinuation of the grinding operation by means (notshown).

It will be seen that the gauge device can and q uickly assembled, andcan be change for grinding different sized bores at .and eiiciency.

I .claim as my invention 1. A'gauge member having, in combination, asupporting rod, a screw threaded into the end of said rod, a pair ofgauge disks mounted on said screw, each disk having a plurality of gaugepoints spaced about its periphery, and means for retaining said disksonlsaid screw and against the end of the rod.

2. A gauge member having, in combination, a support, a screw carried bysaid sup.

port, and a pair of interchangeable gauge disks mounted side by side onsaid screw, each disk having a plurality of gauge points spaced aboutits periphery.

3. A gauge member comprisingwcentrally a ertured disk means adapted toremovab y mounted on a support, said disk means having a lurality ofspaced projections in two para el planes to constitutetwo sets of gaugepoints, the projections in one plane being substantially less in lengththan the projections in the other plane.

4. A gauge member having, in combination, av support, and gauging meanson said support comprising aplurality of s aced coarse feed gauge pointsand a plurality of spaced fine feed gauge points, said coarse feed andline feed points being in different planes and being alternatelyarranged.

5. A gauge member having, in combination, a supporting rod, a screwremovably secured to the end of said rod, and gaugin means comprisingcoarse feed and fine fee gauge points mounted on said screw.

6. A gauge member having, in combination, a hollow supporting rod, ahollow screw threaded into one end of said rod, a

pair of separate gauge disks mounted side by side on said screw andabutting against said end of said rod, said disks having a plurality ofgauge points spaced about their periphery, and an apertured plug fittinginto the outer end of said screw for retaining said disks on said screwand against the end of said rod.

7. A gauge member havincg, in combination, a hollow supporting ro ascrew having threaded engagement with one end of said rod, said screwhaving a longitudinal passage in communication with the interior of saidrod, and a gauge means mounted on said screw, said gaugemeans'comprising two sets of gauge points located in parallel planes. v

' 8. VA gauge member comprising disk means having a plurality ofalternate projections '9. A gauge member comprising, in combination, asup ort, a screw having a bination, a pair of disks having a pluralitythreaded connect1on with one end of said of alternate projections anddepressions, support, a gauge means carried by said said projectionsconstituting gauge points, screw, said means comprising two sets of 15said disks being arranged side by side in points arranged in parallelplanes, the gauge axial alinement, with the projections and de points inone plane being substantially less pressions on one disk registeringrespectively in radial length than the gauge points 1n the with thedepressions and projections on the other plane. other disk, and meansfor supporting said In testimony whereof, I have hereunto 20 l0 disks.axed my signature.

10. A gauge member comprising, in com- HERBERT E. KEMPTON.

